Mary of Waltham
E952733
Mary of Waltham was a 14th-century English princess, the daughter of King Edward III and Philippa of Hainault, who was betrothed in childhood to John V, Duke of Brittany, but died young before fully assuming her role.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mary of Waltham canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T11726637 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Mary of Waltham Context triple: [Philippa of Hainault, child, Mary of Waltham]
-
A.
Margaret of Huntingdon
Margaret of Huntingdon was a 12th-century Scottish noblewoman and princess, daughter of Henry of Scotland and granddaughter of King David I of Scotland, who became an important dynastic figure through her influential marriages.
-
B.
Matilda of Lancaster
Matilda of Lancaster was a 14th-century English noblewoman of the royal House of Lancaster who became Countess of Ulster through marriage and was connected to the Welsh prince Dafydd ap Gruffudd by family ties.
-
C.
Mabel of Gloucester
Mabel of Gloucester was a 12th-century Anglo-Norman noblewoman of the powerful Gloucester family, notable as the daughter and heiress of Robert, 1st Earl of Gloucester, and a key figure in aristocratic alliances of her time.
-
D.
Alice of Norfolk
Alice of Norfolk was a 14th-century English noblewoman, granddaughter of King Edward I, who held significant status through her Plantagenet lineage and aristocratic marriages.
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E.
Mary of Woodstock
Mary of Woodstock was an English princess, daughter of King Edward I, who became a nun at Amesbury Priory and was known for her prominent royal and religious status in the late 13th and early 14th centuries.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Mary of Waltham Target entity description: Mary of Waltham was a 14th-century English princess, the daughter of King Edward III and Philippa of Hainault, who was betrothed in childhood to John V, Duke of Brittany, but died young before fully assuming her role.
-
A.
Margaret of Huntingdon
Margaret of Huntingdon was a 12th-century Scottish noblewoman and princess, daughter of Henry of Scotland and granddaughter of King David I of Scotland, who became an important dynastic figure through her influential marriages.
-
B.
Matilda of Lancaster
Matilda of Lancaster was a 14th-century English noblewoman of the royal House of Lancaster who became Countess of Ulster through marriage and was connected to the Welsh prince Dafydd ap Gruffudd by family ties.
-
C.
Mabel of Gloucester
Mabel of Gloucester was a 12th-century Anglo-Norman noblewoman of the powerful Gloucester family, notable as the daughter and heiress of Robert, 1st Earl of Gloucester, and a key figure in aristocratic alliances of her time.
-
D.
Alice of Norfolk
Alice of Norfolk was a 14th-century English noblewoman, granddaughter of King Edward I, who held significant status through her Plantagenet lineage and aristocratic marriages.
-
E.
Mary of Woodstock
Mary of Woodstock was an English princess, daughter of King Edward I, who became a nun at Amesbury Priory and was known for her prominent royal and religious status in the late 13th and early 14th centuries.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
English princess
ⓘ
medieval English noblewoman ⓘ royal daughter ⓘ |
| associatedWith |
Duchy of Brittany
NERFINISHED
ⓘ
English royal court ⓘ |
| betrothedTo | John V, Duke of Brittany NERFINISHED ⓘ |
| causeOfNotability |
betrothed to John V, Duke of Brittany
ⓘ
daughter of King Edward III of England ⓘ |
| century | 14th century ⓘ |
| countryOfCitizenship | Kingdom of England ⓘ |
| deathBefore | full assumption of role as Duchess of Brittany ⓘ |
| era | Late Middle Ages ⓘ |
| ethnicGroup | English ⓘ |
| father | Edward III of England NERFINISHED ⓘ |
| fullName | Mary of Waltham NERFINISHED ⓘ |
| givenName | Mary NERFINISHED ⓘ |
| historicalPeriod | Hundred Years’ War era NERFINISHED ⓘ |
| languageSpoken | Middle English ⓘ |
| lifeEvent |
betrothed in childhood to John V, Duke of Brittany
ⓘ
died young ⓘ |
| maritalStatus | married young ⓘ |
| mother | Philippa of Hainault NERFINISHED ⓘ |
| nobleFamily | House of Plantagenet NERFINISHED ⓘ |
| parent |
Edward III of England
NERFINISHED
ⓘ
Philippa of Hainault NERFINISHED ⓘ |
| placeOfBirth |
England
ⓘ
Waltham NERFINISHED ⓘ |
| placeOfDeath | England ⓘ |
| positionHeld | Princess of England ⓘ |
| religion | Roman Catholicism ⓘ |
| royalHouse | Plantagenet NERFINISHED ⓘ |
| sibling |
Edmund of Langley, 1st Duke of York
NERFINISHED
ⓘ
Edward the Black Prince NERFINISHED ⓘ Isabella of England, Lady de Coucy NERFINISHED ⓘ Joan of the Tower’s niece ⓘ John of Gaunt, 1st Duke of Lancaster NERFINISHED ⓘ Lionel of Antwerp, 1st Duke of Clarence NERFINISHED ⓘ Thomas of Woodstock, 1st Duke of Gloucester NERFINISHED ⓘ |
| spouse | John V, Duke of Brittany NERFINISHED ⓘ |
| title | Duchess of Brittany-designate NERFINISHED ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Mary of Waltham Description of subject: Mary of Waltham was a 14th-century English princess, the daughter of King Edward III and Philippa of Hainault, who was betrothed in childhood to John V, Duke of Brittany, but died young before fully assuming her role.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Mary of Waltham